Ultrasensitive Determination of Arsenic in Juvenile Eyeshadow by Novel Dispersive Magnetic Solid-Phase Extraction (MSPE) and Flow Injection Analysis - Hydride Generation Atomic Absorption Spectrometry (FIA-HG-AAS)

A new procedure is reported for arsenic preconcentration in juvenile eyeshadow using maghemite nanoparticles (γ-Fe 2 O 3 ) and determination by flow injection analysis - hydride generation atomic absorption spectrometry (FIA-HG-AAS). Maghemite nanoparticles were synthesized and characterized using X...

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Bibliographic Details
Published in:Analytical letters 2023-11, Vol.56 (1), p.132-147
Main Authors: da Costa, Marina Araujo João Lopes, Benevides, Ana Paula, Cesar, Deborah Vargas, Luna, Aderval S., de Gois, Jefferson S.
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Adsorption
Arsenic
Atomic absorption analysis
Carrier gases
Design optimization
Ferric oxide
Flow injection analysis
Flow injection analysis (FIA)
Fourier transforms
hydride generation atomic absorption spectrometry (HG-AAS)
Hydrides
magnetic solid phase extraction (MSPE)
Nanoparticles
Scientific imaging
Solid phases
Spectrometry
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Summary:A new procedure is reported for arsenic preconcentration in juvenile eyeshadow using maghemite nanoparticles (γ-Fe 2 O 3 ) and determination by flow injection analysis - hydride generation atomic absorption spectrometry (FIA-HG-AAS). Maghemite nanoparticles were synthesized and characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and N 2 adsorption measurements at −196 °C. The results showed a crystalline size of 9.1 nm and a surface area of 106 m 2 g −1 . The experimental conditions for the hydride generation system and the preconcentration process were optimized using a central composite design. For hydride generation, the levels of the concentration of the factors HCl, NaBH 4, and flow of carrier gas were optimized, with optimal conditions of 4 mol L −1 , 1.1% (m/v), and 145 mL min −1 , respectively. The optimized conditions obtained for the adsorption process were a pH equal to 5.3, a mass of γ-Fe 2 O 3 of 184 mg, and stirring time of 41 min in the presence of the sample matrix. The enrichment factor was 50, and the limit of detection was 0.9 μg g −1 . Recovery values ranged from 75 to 99%.
ISSN:0003-2719
1532-236X
DOI:10.1080/00032719.2022.2091587